Come on folks. They obviously have not thought too deeply about this.

Only stupid people live by major roads, if they were not stupid they wouldn't live there. As they age, they don't have to lose too many marbles to start to look like dementia cases.

On second thoughts, the researchers are probably global warming researchers, looking for a new grants gravy train.

About thirty years ago the white coats and clipboard scientists told everyone that diesel was the fuel to use in cities. Cleaner they said, much cleaner than petrol. Well now they have said/found out that particulates are the problem? Now we need to phase out diesel?
Muppett politicians especially of the green sort listened to "SCIENTISTS" with all their peer-reviewed bulltish and helped it all along.
Now I am not saying these scientists are the same people as the global warming we are all going to die variety. I am screaming it!
Let us tax research and researchers and ask for bonds so if you do lie you have to pay for it.

From the food that has preservatives, water polluted from liquid wastes, air polluted by the emission of carbon dioxide, pretty much effects from modern lifestyle of people. Only people also causes all the bad effects to people.

Do come off the grass dogline.

None of these things you're bitching about can be all that bad. After all, life expectancy is almost triple what it was a few thousands of years ago, when everything was totally natural, & totally unpolluted.

It is also double what it was in the middle ages, & about 8 years longer today, than when I was a kid.

Still I don't suppose that people like you would ever admit how well we are doing, especially to yourself.